The invention relates to a method and a device for establishing a call on busy. The method can include responding to a called party to be busy in calling, and requesting to perform calling queuing at a user terminal of a calling party; responding to an event, from an application server, of instruct and subscribe the called party to queue; receiving information of queuing state of instructing the called party to perform calling queuing at the user terminal of the calling party after the calling party hangs off, wherein the queuing state at least includes instructing record number of calling located at the position in a queue; and responding to a notice of position of state of to be currently processed of the calling in the queue, and generating a prompt tone at the user terminal of the calling party to prompt the calling party to off-hook. By introducing a calling queuing mechanism and using constantly updating calling queuing information, the calling party conveniently select businesses, and excellent user friendliness is provided.